Ventilating means on ships or aircraft



Patented July 18, 1933 UNITED STATES PATENT OFFICE MAX SCHIRMER, OF FRIEDRICHSHZAFEN, BODENSEE, GERMANY, ASSIGNOR TO LUT T- SCHIFFBAU ZEPPELIN' GESELLSCHAFT MIT BESCHRKNKTER HAFTUNG, OF FRIED- RICHSHAFEN, BODENSEE, GERMANY VENTILATING MEANS 0N SHIPS OR AIRCRAFT Application filed liecember 22, 1930, Serial No.

My invention relates to ventilating means on ships oraircraft, especially on fast vessels of this kind.

The main object of my invention is to reduce the air-resistance of the projecting portions of such ventilating means without reducing their efficiency or even with possibly increasing itat the same time.

For this purpose I combine a ventilator for sucking foul air from rooms inside of the vessel with a ventilator for pressing fresh air into the rooms of the vessels, so as to form only one projecting element having a minimum of air resistance with regard to its function. This projecting element in its outer contour is a tube of substantially stream-line-shaped cross section which at its end is cut off at an inclined plane so as to cause suction in the tube, somewhat resembling a modern Smokestack, and this tube en'- closes a duct or the like of smaller cross section having its opening in the side-wall of the first tube in the direction opposing the direction of travel of the vessel so that fresh air is pressed into this opening.

Having given a general description of the invention I now want to point it out more in detail referring to the drawipgewvhich repre- 503,984, and in Germany December 23, 1929.

There is an outer tube 10, stream-line shaped in cross-section, the upper end of which is cut off at an inclined plane 14 so that air will be sucked off this tube because of the vacuum created behind the bevelled top end. This main tube is in connection with tube 13 through which the foul air is ex-' hausted from the vessel in the direction of arrows 0. Inside of this tube a second tube 11 is situated which leads just below the upper end of tube 10 and opens at 12 into the open air. Through this opening fresh air is pressed into the vessel in the direction of arrow I. Member 15made of sheet metal or the like serves for guiding the incoming fresh air and leading it in downward direction, thus increasing the efliciency of the opening 12 by reducing the turbulencein the air current.

I do not want to be limited to the details described or shown in the drawing as many variations will occur to those skilled in the the like, comprising a tube of substantially streamline shaped cross-section, the outer end of the tube beingropen and in line with the i remaining portion of the tube, said opening being formed by having the tube cut oif at an inclined angle, a second tube inside of the first tube, the outer opening of the second tube penetrating through the sidewall of the first tube substantially at right angles thereto, the forward rounded portions of the sidewalls of the first and second tubes being .integral with each other.

MAX SCHIRMER. 

